Add utf_string_conversions to base namespace.

chrome/installer/gcapi/gcapi_reactivation_test.cc

Index: chrome/installer/gcapi/gcapi_reactivation_test.cc
diff --git a/chrome/installer/gcapi/gcapi_reactivation_test.cc b/chrome/installer/gcapi/gcapi_reactivation_test.cc
index e8cc34de83e5fe6142726f72ecc9bdaacdd0e10a..07b788f1117878dbbcfdb12756ff6706dad984b8 100644
--- a/chrome/installer/gcapi/gcapi_reactivation_test.cc
+++ b/chrome/installer/gcapi/gcapi_reactivation_test.cc
@@ -38,10 +38,10 @@ class GCAPIReactivationTest : public ::testing::Test {
   void SetUp() {
     // Override keys - this is undone during destruction.
     std::wstring hkcu_override = base::StringPrintf(
-        L"hkcu_override\\%ls", ASCIIToWide(base::GenerateGUID()));
+        L"hkcu_override\\%ls", base::ASCIIToWide(base::GenerateGUID()));
     override_manager_.OverrideRegistry(HKEY_CURRENT_USER, hkcu_override);
     std::wstring hklm_override = base::StringPrintf(
-        L"hklm_override\\%ls", ASCIIToWide(base::GenerateGUID()));
+        L"hklm_override\\%ls", base::ASCIIToWide(base::GenerateGUID()));
     override_manager_.OverrideRegistry(HKEY_LOCAL_MACHINE, hklm_override);
   }